S.R.O., issued in 1966, was Herb Alpert and the Tijuana Brass' seventh album.

It included work by Burt Bacharach and Hal David, as well as the band's cover of "Mame" (from the hit musical of the same name), one of the first TJB recordings to include vocals from Alpert, as he and the group sang the song's chorus in the middle of the otherwise-instrumental rendition.

Released as a single, "Mame" reached the U.S. singles top 40, as did "The Work Song," which featured the "ping" sound effect of a hammer or a pickaxe hitting rocks or other solid objects. S.R.O. means "Standing-room only".